New Vaquero grips question for the experts

I have a New Vaquero with the standard black hard rubber grips. I would like to replace them with smooth wood, and I would prefer to buy some that are "flat" (i.e.: 90 degree "square" on the bottom), so when installed, the butt of the gun is flat all the way across, instead of with a bevel upward from the frame like on the factory black hard-rubber grips that came on it.